Method of rolling metal



(No Model.)

W. J. LEWIS. METHOD OP ROLLING METAL.

No. 409,049. Patented Aug. 13, 1889.l

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UNITED STATES 'PATENT OFFICE.

W'I'LLIAM J. LEWIS, OF PI'ITSBURG, PENNSYLVANIA.

METHOD OF ROLLING METAL.

SPECIFICATION forming part of Letters Patent No. 409,049, dated August 13, 1889.

Application tiled May 9, l889. Serial No. 310,138. (No model.)

To all whom zit may concern.-

Be it known that I, WILLIAM J. LEWIS, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and .useful Improvements in l/[ethods of Rolling` Metal; and I do hereby declare the following to be a full, clear, and exact description of the invention, reference being had to the accompanying drawings, which form part of this specification.

This invention has relation to the manufacture of iron and steel stair and floor plates, and has for its object the provision, as a new method of manufacture, ot' rolled plate having ribs, corrugations, or projections on its tread-Surface, and particularly to the method for the production of a rolled plate having diamond-shaped or checkered projections on its upper or exposed surface, the projections being intended to relieve the surface of its otherwise plain and uniform character and to alford a footing to prevent slipping.

Floor and stair plates have heretofore been made of iron by casting in a mold having its inner surface grooved or channeled, so as .to produce a corresponding irregular tread-surface on the cast plate.

I have found that the plates, when steel as Well as iron is employed, may be rolled economically and expeditiously, and that various patterns may be produced on the treadsurface, the outlines of which will be shaped more distinct and which will be far more attractive and acceptable in appearance than those produced by casting. I

In describing the method of rolling the plates I shall refer particularly to the production of the hobnail or diamond pattern, as the same fully illustrates my invention and is an example of a pattern in keeping with thc conventional pattern most frequently seen on iioor or stair plates produced by easting.

1n the accompanying drawings, Figure l is a front elevation of a pair of rolls shaped for rolling plates according to my invention. Fig. 2 is a perspective View of a rolled plate bearing the diamond or hobnail pattern.

The rolls A A are of the ordinary charac- 5 ter, except that the roll A is grooved, ribbed, or liuted circumferentially and is primarily for rolling a plate with corresponding paralleled grooves or ribs on its surface. Such a plate, or one bearing any other suitable pattern produced by rolling instead of lby casting, is an exemplification of the broad idea or improvement comprehended by my invention.

The hobnail, checkered, or diamond pattern shown in Fig. 2 of the drawings is a modification oi' the broad idea, and is referred to not merely to show a special pattern, but to illustrate a particularly neat, attractive, and useful forni ol' ornamentation, which may not only be produced by rolling, but may be produced by the rolls A A.

The method or process ol forming the diamond pattern is very simple, and consists in subjecting the plate to two passes through the rolls at dillerent angles. In the first the plate is fed between the rolls anglcwisethat is, one corner is presented to the rolls and the plate so guided that the surface will be grooved diagonally. For the next pass the plate is reversed-that is, the opposite corner is presented to thc rolls and a second series of diagonal grooves formed intersecting the first and dividing the ribs into studs or projections.

Squares may be produced by rolling the plate the second pass at right angles to the first, while other patterns, the product or resultant of two set-s of grooves at different angles, may be obtained by properly guiding the plate through the rolls.

If desired, the roll A may have any other pattern formed or cut upon its periphery, as I do not limit myself to the present. pattern shown and described, the invention being broadly the method of rolling a stair-plate or licor-plate having a roughened, grooved, or reticulated surface by subjecting it to two or more passes at different angles to each other.

llaving described my invention, what I claim as new, and desire to secure by Letters Patent, iis- The method of forming rolled iron or steel have hereunto set my hand this 8th day of Hoor or stair plates having their tread-sm- May, 1889.

faces gl'ooved or retieulftted, which consists A 1 in subjecting the plate to two or more passes VULIAM J LEWIS at different angles to each other bet-Ween Witnesses:

giooving or channeling rolls.

E. K. STEPHENSON,

In testimony that I claim the foregoing I A. A. CONNOLLY. 

